Langoustine Tails with Lemon Butter

Mix butter, parsley, lemon juice and tarragon.
Split Langoustine tails through top shell being careful not to cut through softer undershell.
Spread Langoustine tails so meat is on top.
In 2-quart oblong baking dish, arrange Langoustine tails; brush each with butter mixture.
TO HEAT BY TIME Cover with wax paper.
Set Power Select at MEDIUM for 11 minutes.
TO HEAT BY INSTA-MATIC Cover completely with 2 pieces of plastic wrap; heat on COOK 7.
Let stand, uncovered, 3 minutes before serving.
Serve with remaining butter sauce.